LightSpeed Technologies CAT 860 - Manual (Page 28)

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1. Overview
2. Setup & Use
3. Optional Accessories
4. T
roubleshooting
5. W
arranty
, Safety
& Specifications
1. Overview
2. Setup & Use
3. Optional Accessories
4. T
roubleshooting
5. W
arranty
, Safety
& Specifications
14. RS-232 SERIAL INTERFACE
COMMAND DEFINITION
CONT’D
Definition: This command causes the CAT 860 to return a query response packet
where the first of two characters contains the selection status set by
AICH (<0x90>) and the second contains the value stored in the volume-level
EEPROM variable selected by the AICH (<0x90>) command.
If the command is not received properly, the CAT 860 responds by sending a
character.
Symbol
Hex
Value
Value Definition
AIAV? 0x95 Command Packet:
The controller sends no
character in the
command packet.
Response Packet:
The CAT 860 sends two
characters in
the response packet. The
possible values are shown
below:
#1:
0x80 = TV/VCR
0x81 = CD/DVD
0x82 = COMPUTER
0x83 = AUX IN
0x84 = IR Channel A
0x85 = IR Channel B
0x86 = AUX OUT
#2:
0xCF = 0 dB
0xCE = -1dB
0xCD = -2dB
0xCC = -3dB
0xA7 = -40dB
0x83 = -76dB
0x82 = -77dB
0x81 = -78B
0x80 = -79dB
ADVANCED COMMAND SET FOR AUDIO MIXER OPERATIONS CONT’D
Audio Input Functions for the A/V Source Group Cont’d
4. QUERY ABSOLUTE VOLUME FOR SELECTED AUDIO INPUT COMMAND
14. RS-232 SERIAL INTERFACE
COMMAND DEFINITION
CONT’D
Definition: This command modifies the volume-level EEPROM variable which
was selected by the AICH (<0x90>) command. The EEPROM variable is set the
value indicated in the character.
Afterwards, the value in the EEPROM variable is unconditionally loaded into the
corresponding volume control hardware register regardless of any prior mute
operation.
If the command is properly received, the CAT 860 responds by repeating back
the command packet where the first of two replacement characters
contains the selection status set by AICH (<0x90>) and the second contains the
resultant value stored in the volume-level EEPROM variable which was modified
by this command.
If the command is not received properly, the CAT 860 responds by sending a
character.
For the audio inputs, the power up default values for all six input volume-level
EEPROM variables is set for -40dB.
Symbol
Hex
Value
Value Definition
AIAV p 0x94 Command Packet:
The controller sends only
one character in
the command packet. The
possible values are shown
below:
0xCF = 0 dB
0xCE = -1dB
0xCD = -2dB
0xCC = -3dB
0xA7 = -40dB**
0x83 = -76dB
0x82 = -77dB
0x81 = -78B
0x80 = -79dB
** Power up default
Response Packet:
The CAT 860 sends two
characters in the
response packet. Possible
values are shown below:
#1:
0x80 = TV/VCR
0x81 = CD/DVD
0x82 = COMPUTER
0x83 = AUX IN
0x84 = IR Channel A
0x85 = IR Channel B
0x86 = AUX OUT
#2:
0xCF = 0 dB
0xCE = -1dB
0xCD = -2dB
0xCC = -3dB
0xA7 = -40dB
0x83 = -76dB
0x82 = -77dB
0x81 = -78B
0x80 = -79dB
ADVANCED COMMAND SET FOR AUDIO MIXER OPERATIONS CONT’D
Audio Input Functions for the A/V Source Group Cont’d
3. SET ABSOLUTE VOLUME FOR SELECTED AUDIO INPUT COMMAND